"She's surprised at how well she's doing," her brother Shawn tells OK!. "She likes being completely clean and sober. It's good that she's there because she has a new level of focus and commitment that she couldn't get on her own."

"Of course she misses, Leah," Shawn says. "But the good news is she gets to talk to her every single day. She makes her mother laugh and smile over the phone. She is such a happy kid."